Pi—it has something to do with circles, right? Just kidding; we know that it's an awe-inspiring constant, irrational, transcendental number that has inspired music, witty T-shirts and jokes (see piday.org). As we usually do when faced with a topic our liberal arts degrees have failed to prepare us for (see also: life), we turn to astrophysicist Neil deGrasse Tyson, the director of the American Museum of Natural History's Hayden Planetarium. His tweet from last year:

"Today is March 14, 2011. Happy Pi Day (3/14) to all those who value pointless numerological distractions."—@neiltyson

Following his lead, we wish a Happy Pi Day to all those who value delicious pastry-based distractions. Here are 36 pies available at bakeries across NYC.